USA Today: Yahoo is changing its logo for the first time in 18 years, and is showcasing 30 options until the final choice is revealed on Sept. 4.

Since [CEO Marissa] Mayer took over as CEO a year ago, Yahoo has scooped up more than 20 companies — including Tumblr and, last week, Rockmelt — and overhauled its existing product lineup, including its home page, Flickr and e-mail.

The charismatic Mayer has also reversed the company's flagging fortunes, with a series of encouraging quarters, an infusion of fresh talent through acquisitions and a 70% bump in its shares. Still, Yahoo faces fierce competition from the likes of Google and Facebook for digital ads.